title: How many balloons do we need to dilate one mitral valve?
authors.forename: T O
authors.initials: TO
authors.lastname: Cheng
mesh_terms: D002404:Catheterization / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D008943:Mitral Valve; D008946:Mitral Valve Stenosis / Q000628:therapy